Does the massage of one's genitalia by a foreign woman constitute zinā, given repeated visits to the massage center and recurring remorse and repentance?

It is forbidden for a man to touch the body of a non-mahram woman due to the proven prohibition of such acts, especially if the touch involves the major 'awrah, as this is a serious prelude to fornication. Therefore, one must repent and stay away from such places, and alert those in charge of the centers to correct these practices.